Atomic Review 2019 Tumminello

Question 1

Which electron configuration represents an excited state for an atom of calcium?

Accepted Answer

2-8-7-3

Question 2

The number of protons in an atom

Accepted Answer

identifies the element, is the atomic number

Question 3

The majority of the mass of an atom comes from which subatomic particle(s)?

Accepted Answer

Neutrons + Protons

Question 4

Modern atomic theory shows electrons orbiting around the nucleus like planets around the sun.

Accepted Answer

False

Question 5

Which two atoms represent isotopes of the same element?

Accepted Answer

E and D

Question 6

Which model of the atom is used today?

Accepted Answer

Electron-Cloud Model

Question 7

Which scientist is responsible for the discovery of the nucleus?

Accepted Answer

Ernest Rutherford

Question 8

The subatomic particle with the least mass is...

Accepted Answer

electron

Question 9

A weighted average of all of the naturally occurring isotopes of an element.

Accepted Answer

Atomic Mass

Question 10

Number of valence electrons for P

Accepted Answer

5

Question 11

Experiments with the cathode ray resulted in the discovery of?

Accepted Answer

Electrons

Question 12

When an excited electron in an atom moves to the ground state, the electron

Accepted Answer

emits energy as it moves to a lower energystate

Question 13

The weighted average of the masses of the isotopes of an element

Accepted Answer

atomic mass

Question 14

The change of an atom from an excited state to the ground state always requires

Accepted Answer

emission of electromagnetic radiation

Question 15

Find the average atomic mass of Chlorine.

Accepted Answer

35.45 amu

Question 16

The subatomic particle with no charge is...

Accepted Answer

neutron

Question 17

What is Niels Bohr’s contribution to modern atomic theory?

Accepted Answer

Electrons are found in specific energy levels.

Question 18

Find the number of neutrons in Si-27

Accepted Answer

13

Question 19

Chlorine-35 has how many protons, neutrons, and electrons?

Accepted Answer

17, 18, 17

Question 20

The subatomic particle that determines the identity of an atom is...

Accepted Answer

proton

Question 21

The net charge of the atom below is...

Accepted Answer

0, no charge

Question 22

What model of the atom is represented in this image?

Accepted Answer

Plum Pudding Model

Question 23

Which subatomic particle has the smallest mass?

Accepted Answer

Electrons

Question 24

The net charge of the nucleus of an argon atom is...

Accepted Answer

+ 18

Question 25

What are valence electrons?

Accepted Answer

the electrons in the outermost energy level

Question 26

Why are atoms electrically neutral?

Accepted Answer

Protons and electrons cancel out each other’s charge.

Question 27

The term “atom” comes from the Greek philosopher named?

Accepted Answer

Democritus

Question 28

The subatomic particle with a positive charge is...

Accepted Answer

proton

Question 29

To find the number of neutrons in an atom...

Accepted Answer

subtract the atomic number from the mass number

Question 30

What is an Orbital?

Accepted Answer

The area where a Electron will probably show up

Question 31

The negative charge of an atom is...

Accepted Answer

located in the electron cloud

Question 32

Name the element with 35 electrons

Accepted Answer

Bromine

Question 33

What did Rutherford conclude about the atom as a result of his Gold Foil experiment?

Accepted Answer

The atom is composed of mainly empty space.

Question 34

Howdo you discover the average atomic mass of an element?

Accepted Answer

(% x mass) + (% x mass)

Atomic Review 2019 Tumminello

Questions 34

Atomic Review 2019 Tumminello

Questions 34